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Add fan-out API to Conversion API, fix erroneous track count validation

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This commit is contained in:
Vanilagy
2026-04-14 16:27:02 +02:00
parent cbbd9bd7fc
commit 2f576aa486
4 changed files with 245 additions and 105 deletions
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test/browser/conversion.test.ts
+54 -1
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@@ -1,12 +1,13 @@
import { ALL_FORMATS } from '../../src/input-format.js';
import { Input } from '../../src/input.js';
import { Mp4OutputFormat } from '../../src/output-format.js';
import { AdtsOutputFormat, Mp4OutputFormat } from '../../src/output-format.js';
import { Output } from '../../src/output.js';
import { BufferSource, UrlSource } from '../../src/source.js';
import { expect, test } from 'vitest';
import { BufferTarget } from '../../src/target.js';
import { Conversion } from '../../src/conversion.js';
import { assert } from '../../src/misc.js';
import { InputVideoTrack } from '../../src/input-track.js';
test('Rotation is baked-in when rerendering', async () => {
using input = new Input({
@@ -47,3 +48,55 @@ test('Rotation is baked-in when rerendering', async () => {
expect(await track.getDisplayHeight()).toBe(570);
expect(await track.getRotation()).toBe(0);
});
test('Exceeding max allowed track count', async () => {
using input = new Input({
source: new UrlSource('/multiple-aac-tracks.mp4'),
formats: ALL_FORMATS,
});
const output = new Output({
format: new AdtsOutputFormat(),
target: new BufferTarget(),
});
const conversion = await Conversion.init({ input, output });
expect(conversion.utilizedTracks).toHaveLength(1);
expect(conversion.discardedTracks).toHaveLength(1);
expect(conversion.discardedTracks[0]!.reason).toBe('max_track_count_reached');
});
test.only('Fan-out', async () => {
using input = new Input({
source: new UrlSource('/video.mp4'),
formats: ALL_FORMATS,
});
const output = new Output({
format: new Mp4OutputFormat(),
target: new BufferTarget(),
});
const conversion = await Conversion.init({
input,
output,
video: [{ height: 480 }, { height: 360 }],
audio: [], // Identical to discarding it
});
expect(conversion.utilizedTracks).toHaveLength(2);
expect(conversion.discardedTracks).toHaveLength(1);
expect(conversion.discardedTracks[0]!.reason).toBe('discarded_by_user');
await conversion.execute();
using otherInput = new Input({
source: new BufferSource(output.target.buffer!),
formats: ALL_FORMATS,
});
const tracks = await otherInput.getTracks() as InputVideoTrack[];
expect(tracks.map(x => x.type)).toEqual(['video', 'video']);
expect(await tracks[0]!.getDisplayHeight()).toBe(480);
expect(await tracks[1]!.getDisplayHeight()).toBe(360);
});